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Finding the Fourth Proportional to 513.18, 769.60 and 269.57

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Solution

The fourth proportional to 513.18, 769.60 and 269.57 is: 404.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.18 : 769.60 = 269.57 : x
  2. Step 2: Convert to fraction form
    513.18/769.60 = 269.57/x
  3. Step 3: Cross multiply
    513.18x = 769.60 × 269.57
  4. Step 4: Simplify right side
    513.18x = 207,462.32
  5. Step 5: Solve for x
    x = 207,462.32/513.18
  6. Step 6: Final answer
    x = 404.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.